Bui. 379, U. S. Dept. of Agriculture. 



Plate II. 



Fig. 1.— Threshing Wheat near Moscow, Idaho, with 8 Per Cent Smut (Esti- 

 mated) IN Crop. 



Fig. 2.— Same Machine Threshing with 14 Per Cent Smut (Estimated) in Crop, 

 Showing Blacker Smut-Dust Cloud Coming from Blower Pipe. 



